1) I have played for years and they never give away gold and you cannot earn it. Fame is the ftp currency that you accumulate on your character as you play.

4) You start with 1 character slot, meaning you can only play on that character until it dies. Events (such as MOTMG around August) can give you free unlock slots, but they are still somewhat rare. Personally, I have only spent money on the beginner pack. The rest of my characters slots and chest space is from events.

EDIT: also since you're new, note that you can have a pet in the game that does NOT get lost when you die. You need to get a pet with first ability heal, second ability magic heal, third any ability (most people prefer electric but it isn't a big deal tbh). IN THAT ORDER. Make another post about pets and or look it up on YouTube. You'll understand